JPH075018B2 - Vehicle refrigerator - Google Patents

Description

TECHNICAL FIELD The present invention relates to a vehicle refrigerator suitable for mounting on a vehicle, particularly a passenger car.

[Prior Art] Fig. 10 is a perspective view of a typical basic structure of a conventional vehicle refrigerator having a structure in which a unit for generating cold air and a refrigerating case unit are separably united from each other. Shown as a figure. In the figure, 50 has a double-wall structure and a structure in which the intermediate part between the walls of a box-shaped casing made by injection molding a general-purpose synthetic resin such as polyethylene is filled with a heat insulating material such as rigid polyurethane foam. A refrigerating case unit, 51 is a cooling unit accommodating an evaporator as a cold air generator, 52 is a compressor unit for supplying a liquid phase refrigerant to the cooling unit, and these three units use fasteners or the like. It is separably united. Between both units 50 and 51, there is a heat exchange space for exchanging heat between the air in the refrigerating case and the evaporator, and a window shape for communicating the air in the refrigerating case with this heat exchanging space. The air inlets and outlets 60 and 61 are simultaneously formed when the refrigerating case unit 50 is molded. Further, the cooling unit 51 is provided with a fan 53 for circulatingly contacting the air in the refrigerating case with the evaporator. It should be noted that the refrigerating case and the cooling unit are hardly separated under normal use because it takes time to assemble the refrigerant pipes.

[Problems to be Solved by the Invention] As described above, the cold air generating unit fixedly installed at an appropriate place in the vehicle compartment and the cold air generating unit can be removed from the cold air generating unit during use and can be moved. The conventional two-part type refrigerator for vehicles, which consists of a refrigerating case unit that can be removed for effective use of the vehicle interior space during the season, makes the units contact each other in order to circulate the air in both units. Although a window-shaped ventilation hole was provided in the center of the wall surface of the unit, the casing that constitutes both units is generally made by injection molding polyethylene, polystyrene, or other general synthetic resin. It was difficult to avoid a great disadvantage from the standpoints of die manufacturing cost and molding cost by providing a hollow hole portion on the side wall surface of the. In addition, even if the refrigerating case is temporarily removed and moved during use, there is a problem that the cold air is likely to flow out from the window-shaped ventilation hole to the outside.

The present invention is provided with ventilation holes for air circulation,
The casing of the cold air generating unit and the refrigerating case unit made by synthetic resin injection molding etc. can be manufactured more efficiently and cheaply, and even when temporarily separating both units during use, ventilation holes are provided. It is an object of the present invention to provide a vehicle refrigerator having a structure in which cold air does not easily flow out.

[Means for Solving the Problem] In order to achieve the above object, the vehicular refrigerator of the present invention comprises:
A unit for generating cold air in which a heat exchanger for generating cold air is housed in a heat-insulating box body, a refrigerating case unit detachably attached to the side wall of the unit for generating cold air, which is composed of a heat-insulating box body, and both units. A configuration including a ventilation passage for circulation and circulation of air inside both units provided at each upper end portion and a fan for circulation and circulation of air inside both units are adopted.

[Operation] The vehicular refrigerator of the present invention having the above-mentioned configuration is provided with the cold air generating unit formed by the injection molding method of general-purpose synthetic resin and the air inside the refrigerator to be provided in each casing forming the refrigerating case unit. Since the circulation ventilation passage of is formed in the upper end of the casing, which is formed in combination with a box body having an open top surface and formed separately,
Unlike the conventional method of providing a hollow ventilation passage on the side wall surface of the casing, it is not necessary to assemble a slide core in the mold, and the ventilation passage has an upper end even when the refrigeration case unit is temporarily removed during use of the refrigerator. Since it is located in the section, it is possible to remarkably reduce the risk that cold air having a larger specific gravity than the outside air existing in both units will flow out to the outside world.

[Example] The vehicle refrigerator of the present invention will be specifically described below with reference to the accompanying drawings.

FIG. 1 is a side sectional view of a vehicular refrigerator of the present invention, which is detachably attached to three constituent parts, that is, a refrigerating case unit part A, a cold air generating unit part B, and a ventilation path unit part C. It consists of and. The refrigerating case unit A and the cold air generating unit B both have a box-shaped body with an open top surface and a lid, and both are made of synthetic resin such as polyethylene, polystyrene, or ABS resin and are injected. It has a double wall structure formed by a molding method, etc., and the voids between the walls are filled with a heat insulating material such as rigid polyurethane foam. Ventilation unit C
Is a hollow columnar body having a substantially trapezoidal cross section and an opening toward the bottom surface as shown in the perspective view of FIG.
Having an adiabatic double wall structure is similar to units A and B above.

Reference numeral 1 is a refrigerating case unit body, 2 is a lid body of the refrigerating case unit 1, 2a is a rounding portion formed at an end portion of the lid body 2 on a rotation side, and the width of the lid body 2 is the case unit body 1 Since it is narrower than the opening width of the top surface, a ventilation path a is formed at the upper end of the refrigerating case unit A when the lid 2 is closed. Reference numerals 3 and 4 denote a permanent magnet piece for fixing the lid body 2 and a magnetic metal piece which are screwed to the lid body 2 and the refrigerating case body, respectively.

Reference numeral 5 denotes a cold air generating unit main body, 6 denotes a lid-like member for adiabatically closing the top surface opening of the cold air generating unit main body 5 while leaving the ventilation path b, and 7 denotes a cool storage agent 8. In the filled regenerator case, a heat exchanger for generating cold air, which is supplied with a refrigerant from the refrigeration cycle of the vehicle interior air conditioner in order to cool the regenerator, in this case, an evaporator 9 made of a corrugated tube made of aluminum is incorporated. .

Reference numeral 11 denotes a main body of an air passage unit C that functions as a communication passage between the air passages a and b provided at the upper ends of the refrigerating case unit A and the cold air generating unit B. B Fan for air circulation in both units 12
Is assembled.

2 and 3 show a state in which the refrigerator is assembled and 3
FIG. 3 is a perspective view showing a state in which the unit is separated into two units, 13 is a rotary shaft for opening and closing the lid 2, and 14 is a lid-shaped body
The stoppers 15 and 17 and 16 and 18 are respectively attached to the ventilation passage unit C and the cold air generating unit B and the refrigerating case unit A and the cold air generating unit B by engaging and disengaging clasps, respectively. There is. Reference numerals 19 and 20 are refrigerant circulation pipes to the evaporator 9.

FIG. 4 is a perspective view of the air passage unit C as seen from below, in which the inner space of the main body 11 of the unit C is divided into two parts, d and e, by the partition wall 11a in the longitudinal direction. , D function as a cold air return path for returning the air in the refrigerating case body 1 into the cold air generation unit body 5, and the e part functions as a cold air generation outward path. 24 is a base body for attaching the fan 12 to the d portion forming the cool air return path,
Reference numeral d'denotes an outlet for sending the air taken in by the fan 12 into the cold air generating unit body 5.

FIGS. 5 and 6 are a side view and a cross-sectional view including a partial fracture surface of a cold storage agent case in which a heat exchanger for generating cold air is incorporated, and a cold storage agent case 7 made of aluminum or the like is shown in FIG. A lid 10 with a vent is fitted. g is a space for heat exchange of air. Reference numeral 21 is a constant-pressure expansion valve for expanding the refrigerant, and an enclosing pipe 22 in which an inert gas for obtaining a constant pressure is enclosed is attached to the refrigerant pipe 20 via a heat insulating material. 23 is a check valve.

Next, the operation of the refrigerator having the above configuration will be described.

By turning on the starting switch to use the refrigerator, the cooling capacity of the vehicle interior was impaired based on the judgment of the control amplifier for controlling the refrigeration cycle of the vehicle interior air conditioner, which is the cold heat supply source of this equipment. The supply of the refrigerant is started to the evaporator 9 in the cold air generating unit within the limit not to do so, and at the same time, the fan 12 for circulating and circulating the air existing in the refrigerating case unit main body 1 and the cold air generating unit main body 5 starts to rotate. . The cold storage agent 8 cooled by absorbing cold heat from the refrigerant cools the metallic cold storage agent case 7, and as can be understood by referring to FIG. 1 and FIG. Inside the air passage unit main body 11 through the air passage a at the upper end of the case 1 as shown by the broken line arrow (a) in the air existing in the inner portion (with respect to the paper surface of FIG. 1) Empty space d
After being sucked by a fan 12 attached to the portion, it is blown out from a d'portion that opens toward the inside of the cold air generating unit body 5, and the upper end of the cold air generating unit body 5 located opposite to this d'is aerated. It is cooled by flowing into the heat exchange gap g of the unit body 5 from the passage b. The air flow, which has once flowed down to the bottom of the gap g due to the blowing pressure, then moves forward in the direction of (paper surface) and follows the ascending path shown by the solid line in the figure, and the air passage b From the front side portion toward the front side inner space e in the ventilation path unit main body 11, it collides with the blowing ceiling portion and rolls to the left in the figure, and from the upper end ventilation path a of the refrigeration case unit main body 1 to the inside of the case. Is blown into the space on the front side of the case as indicated by the solid arrow (b) to cool the inside of the case. The air that has flowed down to near the bottom and has exchanged heat with the contents of the case and has become warmer will roll toward the inside of the case and will follow the flow path shown in (a) again.

After the supply of the refrigerant from the air conditioner is cut off by stopping the engine of the vehicle, the cold storage function of the cold storage agent, which is sufficiently cooled by the refrigerant during the operation of the refrigerator, allows the cold storage function to be continuously maintained. It is possible to keep the inside of the refrigerator sufficiently refrigerated at least while going out for a day trip and parking the car at the destination.

In the above-described embodiment, since the ventilation paths a and b are provided on the top surface portions of the refrigerating case unit main body 1 and the cold air generating unit main body 5, it is inevitable that the ventilation path unit C is necessary. If the upper end portions of the contact wall surfaces of both units to be struck against each other are cut off to some extent, the cut portions function as the ventilation paths a and b, so that the ventilation path unit C can be abolished and replaced with a simple lid. . In this case, the fan 12 may be installed by providing a space near the top end of the cold air generating unit B. Of course, also in the case of this embodiment, it is possible to eliminate the difficulty of providing a ventilation cutout window in the refrigerating case and the problem of outflow of cold air.

The device of the present invention can be used not only as a refrigerating function but also as a warming cabinet for warming the contents.

FIG. 7, FIG. 8 and FIG. 9 have explained the embodiment in which the electric resistance heating element is incorporated in the inner space of the air passage unit C in order to give the refrigerator of the present invention a function as a heating cabinet.
25 is a bottom bottom perspective view of the air passage unit C, a lateral cross-sectional view of the refrigerator, and a side cross-sectional view in the vicinity of the air passage unit C, where 25 is a hollow provided in a partition wall 11'a of the air passage unit body 11 '. A ceramic type electric resistance heating element mounted so as to fit into the hole f, and 27 is a shield plate,
In order to prevent the cold air generating unit body 5 from entering through the hollow hole f of the partition wall 11'a into the inner space e,
It serves to seal the air passage b at the upper end of the unit main body 5, and as shown in FIG. 8, the opening of the inner space e is formed so as to close the upper air passage b of the cold air generating unit C. It applies only to the half part of the unit C side of the. Shroud
27 may be screwed to the unit C as shown in the figure, but it can be locked in a groove or a recess provided in the unit C by a sliding type or a snap-in type, or can be opened and closed by a hinge. The attachment / detachment and opening / closing can be performed more easily.

In the embodiment shown in FIG. 7 to FIG. 9, the ventilation passage unit C for the refrigerator is diverted as it is as the ventilation passage unit for the warm storage to make a partial design change. A ventilation path unit may be newly manufactured. In that case, the shielding plate 27 is made unnecessary.

[Effects of the Invention] The vehicle refrigerator of the present invention has the following effects.

Unlike the conventional refrigerator of the same type, the cold air generating unit and the refrigerating case unit that compose the refrigerator are provided with an air passage between both units at the upper end of the box-shaped unit-constituting casing with an open top surface. Therefore, when the casing is made by the synthetic resin injection molding method, the labor and cost of the molding can be greatly reduced.

Further, when the refrigerating case units are separated during use of the refrigerator, the cold air in both units can be suppressed from flowing out to the outside significantly.

[Brief description of drawings]

FIG. 1 is a side sectional view of a vehicle refrigerator according to the present invention, FIGS. 2 and 3 are perspective views of the refrigerator showing the assembled and separated units, and FIG. 4 is a ventilation unit. Lower bottom perspective view, FIG. 5 and FIG. 6 are side views and cross-sectional views of the regenerator case, respectively, and FIG. 7, FIG. 8 and FIG. 9 have a heating element incorporated to provide a heating function. The bottom bottom perspective view, the refrigerator horizontal cross-sectional view, and the side cross-sectional view in the vicinity of the ventilation unit of the air passage unit, which explain the embodiment, respectively, and FIG. 10 are perspective views of respective constituent units of the conventional vehicle refrigerator in a separated state. In the figure, A ... Refrigerating case unit, B ... Cold air generating unit, C ... Ventilation path unit, 1 ... Refrigerating case unit main body, 2 ... Refrigerating case lid, 6 ... Regenerator case, a ... ... upper air passage of unit A, b ... upper air passage of unit B, d, e ... air passage of unit C

Continuation of the front page (56) Reference JP-A-60-261738 (JP, A) Actually opened 56-15969 (JP, U) Actually opened 55-159984 (JP, U)

Claims (5)

[Claims] 1. A cold air generating unit in which a heat exchanger for generating cold air is housed in a heat insulating box, and a refrigerating case unit made of a heat insulating box and detachably attached to a side wall of the cold air generating unit. A vehicle refrigerator comprising: a ventilation passage for circulation and circulation of air inside both units, which is provided at an upper end of each of the units; and a fan for circulation and circulation of air inside both units. 2. The air passage constitutes an air passage unit independent of the both units, and is detachably attached to one or both of the cold air generating unit and the refrigerating case unit. The vehicle refrigerator according to claim 1. 3. The vehicle refrigerator according to claim 1, wherein the air circulation fan is incorporated in the air passage unit. 4. The cold heat generating heat exchanger uses, as a cold heat source, a cold storage material which is cooled by receiving a supply of a refrigerant from an in-vehicle air conditioner. The vehicle refrigerator according to any one of 1. 5. The vehicle refrigerator according to claim 1, wherein a heater for heating the refrigerating case is incorporated in the ventilation passage unit.